Finishing machine



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FINISHING MACHINE Filed May 17, 1940 2 Sheets-Sheet 1 TigflQ Tigtz May 19, 1942. w HAMANN 2,283,204

FINISHING MACHINE Filed May 17, 1940 2 Sheets-Sheet 2 89 50 Q on Tlgilr. Z?

Patented May 19, 1942 nuirn srres FINISHING MACHINE Jersey Application May 17, 1940, Serial No. 335,725

16 Claims.

This invention relates to finishing machines and is illustrated herein as embodied in an edge setting machine of the type disclosed in United States Letters Patent No. 2,190,810 granted February 20, 1940, on an application of L. E. Topham.

Edge setting machines are usually of the twin type, that is, they are provided with two operating stations located respectively on opposite sides of the machine, each operating station having a tool holder which is vibrated back and forth at a high rate of speed. It oftentimes happens that one of the stations will be idle when the other is in use, which results in needlessly wearing the idle parts and wasting the power required to operate them.

With this in view, it is an object of this invention to provide means for selectively disconnecting the tool holders from the operating means and for moving the tool holders to and holding them in a position of rest when they are out of use. As illustrated, this means comprises a pair of members arranged to engage each tool holder and move it relatively to the operating means to a position of rest where the tool holder is disconnected from the operating means. In addition to preventing needless wear on the moving parts, a further advantage of this feature of the invention is that it makes it possible for the operator to change the tools while the tool carriers are held stationary. This is particularly advantageous when tool-operated clamping means are used to connect the finishing tools to the tool carriers as the tools can be changed on either one of the tool holders without shutting down the machine. To facilitate tool changing, holding means are associated with the members which move the tool holder to its position of rest, the holding means being arranged positively to prevent vibration of the tool holder while changes are being made.

With the above and other objects in view, the invention will now be described with reference to the accompanying drawings and will be pointed out in the appended claims. In the drawings,

Fig. 1 is a front elevation of the tool holder 71 lockout device showing the relative positions of the tool holder lugs andthe lockout members when the tool holder is in its position of rest;

Fig. 2 is a side elevation of the tool head at one station of an edge setting machine in which the present invention is embodied;

Fig. 3 is an angular View of the tool holder lockout device; 7

Fig. 4 is a schematic plan view of a twin edge setting machine showing the arrangement of the tool holder lockout device at each operating station;

Fig. 5 is a side View of the tool clamping means shown in Fig. 2;

Fig. 6 is a front view of the construction shown in Fig. 5;

Fig. 7 is an angular view of the tool shown in Fig. 5;

Fig. 8 is a side View of the wrench for operating the clamping means shown in Fig. 5; and

Fig. 9 is a fragmentary view on an enlarged scale taken on line IX-IX of Fig. 1.

The illustrated machine, to which applicants invention has been applied, is of the type shown in the beforennentioned patent to Topham No. 2,190,810 and consists of a head HI (Fig. 4) having a pair of oppositely-located operating stations l I and I2. The mechanism at each operating station includes an oscillating shaft 1-3 (Fig. 2) which is mounted in a bearing I4 and is vibrated back and forth at a high rate of speed by a driving mechanism of the type. illustrated in the Topham patent. Slidably and rotatably mounted in the shaft 53 is a spindle l5 which is connected with a tool holder 15 and is urged in the direction of the shaft l3 toward the head ID by an enclosed spring 91. The shaft I3, bearing 14, spindle i5 and spring I"! correspond respectively to the members 35, 39, $94 and I22 in the machine disclosed in the Topham patent (see Fig. 4 thereof).

The shaft 13 is provided with a comparatively large head 18 having a pair of oppositely-disposed notches 19 (Fig. 1) which receive projecting lugs 20 on the tool holder and, together with the lugs, form a driving connection that causes the tool holder to move with the shaft. The tool holder is rotated through 180 to interchange the tools by a shifting lever which consists of a hand crank 22 pinned to the mid-portion of a shaft 24 and a pair of spaced arms 25, 28 which are fastened respectively to the opposite ends of the shaft 24. The arms 26, 23 extend along opposite sides of the head I t to points behind the notches l9 where they are provided with plates 30 which are located behind inclined flanges 32 (Fig. 2) on the lugs 20. When it is desired to change the tools, the hand crank 22 is rockedin a counterclockwise direction, as viewed in Fig. 3, causing the plates 30 to strike the flanges 32 and lift the lugs 20 onto inclined cam plates 34 on the shaft head l8 after which the tool holder is rotated through in a clockwise direction, in a manner which is fully described in Letters Patent of the United States No. 1,986,968 granted January 8, 1935, on an application filed in the name of William Hamann. The plate on the arm 26 (Fig. 1) is provided with a shoulder 36 which is located behind the flange 32 on the lug 20 seated in the upper notch l5 and prevents inadvertent movement of the tool holder in a backward direction as the lugs are being moved out of the notches l9 by the shifting lever.

The shaft 24 is rotatably mounted in bearings 38 formed in spaced arms 40 which extend laterally from a collar 42 that is fastened to the bearing l4 behind the tool holder IS. The shifting lever is normally held in an inoperative position by a spring 44 (Fig. 3) interposed between a lug 45 projecting upwardly from the upper ,collar arm 40 and a rearwardly extending projection 48 on the shifting lever arm 26.

When an operating station is to be idle for a time, the driving connection between the tool holder I6 and the vibrating shaft I3 is interrupted by a pair of cylindrical members 50 which are located in the path of rotation of the flanges 32 on the tool holder l6 and which serves to move the tool holder outwardly from the head l8 of the vibrating shaft, or to the right, as viewed in Fig. 2. The ends of the members 50 which engage the flanges are cut away to form shoulders 18 and abutment surfaces 19 (Figs. 3 and 9) which contact respectively the leading sides and bottoms of the flanges. Referring to Figs. 1 and 3, it will be seen that the members 50 are located on opposite sides of the head l8 of the vibrating shaft where they are slidably mounted in cylindrical openings 52 (Fig. 2) formed in the collar 42 and in lugs 54 which project from the collar.

The lower sides of the lug 54 are cut away to expose rack teeth 56 formed on the mid-sections of the members 50. The members are moved back and forth in the openings 52 by arms 58, 60 (Fig. 3) which are provided at one end with gear segments 62 (Fig. 2) that extend through the openings in the lugs 54 and mesh with the rack teeth 56 on the members 50. The arms 58, 60 are mounted on a shaft 64 which is rotatable in bearings 66 that extend outwardly from the collar 42. The arm 58 is pinned to the shaft 64, while the arm 50 is adjustable thereon and is connected to the shaft by a bolt 68 and a throw-out lever 10 which is pinned to the shaft. The bolt 68 extends through a slot 12 (Fig. 2) in the throw-out lever 10, thus providing an adjustment for correlating the position of the members 50 when the machine is being assembled as the bolt can be loosened and the arm 60 adjusted to bring its associated member 50 into the desired relation with the other member 50, whereupon the bolt 68 can be tightened to hold that adjustment.

The throw-out lever 10 is normally urged in a rearward direction toward a stop pin 14 (Figs. 1 and 2). or to the left, as viewed in Fig. 2, by a spring 16 (Fig. 3) which surrounds the shaft 64 and is connected at one end to the shaft and at its other end to the adjacent bearing 66.

When it is desired to move the tool holder IE to a position of rest, the throw-out lever 10 is moved forwardly until the shoulders 18 on the ends of the members 50 are located in the path of rotation of the flanges 32 (Fig. 2) on the tool holder, whereupon the shifting lever 22 is operated to initiate the rotation of the tool holder. The tool holder rotates about the vibrating shaft l3 until the flanges 32 strike the shoulders 18 on the members 50 which stops further rotary movement of the tool holder.

The throw-out lever 10 is then moved forward an additional distance, causing the abutment surfaces 19 to act on the bottoms of the flanges 32 and move the lugs 20 away from the cam surfaces 34 on the shaft head !8, thereby disconnecting the tool holder from the vibrating shaft so that the tool holder remains stationary. The throw-out lever is held in this position by the engagement of a pawl carried by that lever with the end tooth of a ratchet 82, the ratchet being formed on a plate 84 which is adjustably connected to the lug 54, shown on the left side of Fig. 3, by a screw 86. The location of the position of rest of the tool holder can be adjusted by loosening the screw 85 and moving the plate 84 forwardly or rearwardly a desired amount, and then tightening the screw to hold the plate in its adjusted position. If desired, a second ratchet tooth such as the one shown in Figs. 2 and 3 may be provided for locating the members 50 in their intermediate position where they interrupt rotation of the tool holder.

It will be noticed that the members 50 are spaced about half way between the notches l9 so that the finishing tools are well-removed from the usual tool heating means when the tool holder is engaged by the members 50 and the tools do not become overheated while the tool holder is in its position of rest. The sides of the members 50 opposite to the shoulders 18 (Figs. 3 and 9) are beveled in order that the flanges 32 can ride up onto the abutment surfaces 19 if the intermediate setting of the members 50 moves the abutment surface beyond the bottom of the flange 32. The flanges 32 are positively held in engagement with the members 50, while the tool holder is in its position of rest, by a latch 89 (Figs. 1 and 9) which engages the trailing side of the flange 32 seated on the member-50 adjacent to the shaft 24 and prevents the bottom of the flange from slipping off the abutment surface 19.

The lugs on the tool holder each have an outwardly extending portion which terminates in a cylindrical head 90 having a downwardly and inwardly inclined opening in which is slidably mounted a tool carrier spindle 92. The spindles are urged outwardly by coiled springs 94 which engage the inner ends of the spindles and are sleeved about posts 96, this arrangement being fully illustrated and described in Letters Patent of the United States No. 2,185,504 granted January 2, 1940, on an application filed in the nameof William Hamann. Outward movement of the spindles is limited by light L-shaped springs 98 which are fastened to the heads 90 and extend from the heads rearwardly into recesses formed in the inwardly projecting ends of the spindles. The latches now in general use for fastening the finishing tools to the tool carriers are of a yielding character which permits play between the tools and the carriers when they are vibrated at high speeds, such as are used in machines of the type disclosed in the before-mentioned patent to Topham No. 2,190,810, which causes appreciable wear on the tools. As the over-all movement of the burnishing tools is very small, being in the neighborhood of 1% of an inch, the wear between the tools and the tool carriers increasingly reduces the movement of the tools until the point is reached where the tools are ineffective and must be discarded.

' In the illustrated construction, this difiiculty is overcome by using clamping means which eliminate lost motion between the tools and the tool carriers. Referring to' Figs: 5 and 6 wherein different views are shown of the clamping means disclosed in Fig. 2, it will be seen that the tool carrier head Ill!) and the tool I02 are provided with complementally-shapedinterlocking surfaces which are held clamped against each other by a transversely extendingbolt I04; The tool carrier head I is. relieved to form a wedgeshaped flange having an inclined surface I66 and a horizontal end portion llltfrom which extends a finger H0; As will best be seen in Fig; 7, the tool, having a burnishing surface III, is provided with a wedge-shaped extension having an inclined surface H 2 which issloped complementally to the surface Hi6 on the tool carrier and a horizontal shelf in which there is a recess Us for the reception of the finger H0 onthe tool carrier. The bolt IE4 extends through a slot H6 in the tool extension, thence through an opening in the tool carrier head I06, and projects a short distance beyond the face of the head; The projecting portion of the bolt is. surrounded by a displaceable abutment consisting of a slotted plate H8 pivoted at I20 to the tool. carrier head :00, a washer I22, and'a nut I24. The tool is quickly releasedfrom thetool carrier by a socket wrench [23' having a laterally extending finger 128. The finger is arranged so thatit will strike the plate H8 after the nut I24 has been backed off slightly, say A; of a turn, and will knock the plate out from beneath the washer 122, allowing the bolt to move bodily to the left and the tool to be withdrawn.

The device for clamping the'tool N12 to thetool carrier head I 89 forms the subject matter of. and is claimed in an application for United States Letters Patent Serial No. 400,179, filed June 28, 1941, in my name.

To prepare the machine for operation, finishing tools are fastened to the tool carriers by clamping means of the type illustrated herein. When one of the stations is to be idle for any length of time, the throw-out lever '50 is moved outwardly to the position shown in Figs. 2 and 3 where the shoulders 18 on the members i) are located in the path of rotation of the flanges 32 on the tool holder. The tool holder shifting lever 22 is then depressed, causing the tool holder to rotate until the flanges strike the shoulders 18, at which time the throw-out lever ll! is moved outwardly to move the tool holder away from the vibrating shaft to disconnect the holder from the shaft. The toolholder is held in the latter position by the engagement of the pawl tooth 86 on the throw-out lever with the ratchet tooth When it is desired to change the tools on a 82. tool holder, the latch 89 on the shaft 24 is manually moved to the left by a hand lever 89a, as viewed in Figs. 1 and 3, until it lies above the flange 32 in engagement with the right-hand cylindrical hold-out member 50, thereby holding the flange between it and the shoulder 18. The tool holder being positively held in a stationary position makes it possible for the operator quickly and easily to change the tools. sired to operate the idle station again, the latch 89 is moved back to the position shown in Fig. 3 and the throw-out lever is moved'backwardly o1 to the left, as viewed in Fig. 2, until the members 56 are moved out of engagement with the flanges 32, when the rotation of the tool holder will automatically be resumed until the lugs are seated- When it is declaim'as new and-desire to secureby Letters Patent of theUnited'States is:

1. Tue burnishing machine having a plurality of operatingstations, a tool holder at each station,- means for vibrating the tool holders, and means associatedwith" the tool holder at a stationfor disconnecting the tool holder at that station from the vibrating means and for moving the tool holder to and holding it ina disconnected position of restwhereby a station can be rendered inoperative when not in use.

2. In a burnishing machine having a plurality of operating stations, a tool holder at each station, means for vibrating the tool holders, means associated with each tool holder for disconnecting such tool holder from the vibrating means and'for moving it to a position of rest, and means for positively preventing movement of each tool holder in its position ofrest.

3. In a burnishing machine having a plurality of operating stations, a vibrating-shaft at each station, a holder for a plurality of tools rotatably mounted on each vibrating shaft, means associated with each tool holder for rotating that tool holder about its shaft to interchange the tools, andmeans associated with each tool holder for interrupting the rotation of that tool holder and for moving it toand holding it in a position of rest.

4; In a burnishing machine having a plurality of operating stations, a vibrating shaft of each station, a holder for a plurality of tools'rotatably mounted on each'vibrating shaft, clamping means for connectingthe tools tothe tool holders, means associated with each tool holder for rotating that tool holder about its shaft to interchange the tools, means associated with each tool holder for interrupting the rotation of'that tool holder and for moving it to a'position ofrest, and means for positively holding each tool holder stationary while in the position of rest so that the opera-tor can release the tool clamping means and change the tools.

5. In a finishing machine, a holder for aplurality of' finishing tools, means for Vibrating the tool holder, and means for disconnecting the tool holder from the vibrating means and for moving said holder to and holding it in a disconnected position of rest. I e 6. In a finishingmachine, avibrating shaft, a holder for a plurality oftool's rotatably mounted on said shaft, means for rotating the tool holder about the shaft to interchange the tools, and means for interrupting the rotation of the tool holder and for moving it to and holding it in a position of rest.

7. In a finishing machine, a vibrating shaft, a holder for a plurality of tools rotatably mounted on said shaft, means for rotating the tool holder about the shaft to interchange the tools, means for interrupting the rotation of the tool holder, said last-named means being arranged to move the tool holder to a position of rest, and a latch for retaining the tool holder in its position of rest.

8. In a burnishing machine, a vibrating shaft, driving means arranged to operate the vibrating shaft at a high rate of speed, a tool holder rotatably mounted on the vibrating shaft, tool-operated clamping means for connecting burnishing tools to the tool holder, and means for disconnecting the tool holder from the driving means and for moving the holder to and holding it in a position of rest where the clamping means can be released and the tools changed,

9. In a finishing machine, a vibrating shaft, a

holder for a plurality of tools rotatably mounted on said shaft, means for rotating the tool holder about the shaft to interchange the tools, an abutment for interrupting the rotation of the tool holder, means for moving the abutment axially of the shaft to cause the tool holder to be tively at opposite sides of the shaft, said abut-' ments being constructed and arranged to be engaged by the tool holder and then to move the holder axially of said shaft to a position of rest, and means for insuring against retractive movement of the abutments to retain the holder in said position of rest.

11. In a finishing machine, a vibrating shaft, a holder for a plurality of tools rotatably mounted on said shaft, means for rotating the tool holder about the shaft to interchange the tools, abutments located respectively at opposite sides of the shaft, means comprising a manually-operated lever for causing said abutments to interrupt the rotation of the tool holder and move it to a position of rest, and means for locking said last-named means against retractive movement to retain the tool holder in said position of rest.

12. In a finishing machine a vibrating shaft, a holder for a plurality of tools rotatably mounted on said shaft, means for rotating the tool holder about the shaft to interchange the tools, tool holder engaging members located respectively on opposite sides of the shaft means for causing said members to interrupt the rotation of the tool holder and move it to a position of rest, and a latch associated with the last-named means for preventing movement of the tool holder while in the position of rest.

13. In a finishing machine, a vibrating shaft,

a holder for a plurality of tools rotatably mounted on the shaft, said shaft and said holder having cooperating faces oblique to the longitudinal axis of the vibrating shaft, means for holding said faces in-abutting relation whereby the movements of the shaft in one direction are utilized to rotate the tool holder about the shaft to cause an interchange of tools, a pair of members arranged for movement into the path of rotation of the tool holder to interrupt its rotary movement, and an operating lever for causing the reciprocating members to move the cooperating faces on the shaft and the tool holder out of abutting engagement with each other.

14. In a finishing machine, a vibrating shaft having inclined surfaces, a holder for a plurality of tools rotatably mounted on said shaft, said holder having lugs arranged for sliding engagement with the inclined surfaces on the shaft when the holder is rotated, yieldable means for urging the lugs into engagement with the inclined surfaces, a pair of members movable into the path of rotation of the lugs on the tool holder, and means for causing the members to move the lugs out ofengagement with the inclined surfaces on the shaft against the resistance .of the yieldable means.

15. In a finishing machine, a vibrating shaft having inclined surfaces, a holder for a plurality of tools rotatably mounted on said shaft, means for rotating the holder to interchange the tools, said tool holder having lugs arranged for engagement with the inclined surfaces on the shaft when the holder is rotated, a pair of reciprocating members located on opposite sides of the shaft, means for causing said members to engage the lugs and move them out of abutting engagement with the inclined surfaces, and a latch associated with one of the reciprocating members and arranged to hold a lug in engagement with that member while the lugs are out of abutting engagement with the inclined surfaces on the shaft.

16. In a finishingv machine, a vibrating shaft having surfaces oblique to the longitudinal axis of the shaft, a holder for a plurality of tools rotatably mounted on the shaft, said holder having lugs arranged for sliding engagement with said surfaces when the holder is rotated, means for holding the lugs in engagement with the surfaces whereby oscillations of the shaft in one direction are utilized for rotating the tool holder about the shaft to cause an interchange of tools, a pair of reciprocating members located on opposite sides of the shaft, and manually-operated means 7 arranged to move said members into the path of rotation of said lugs to interrupt the rotation of the tool holder and then to cause the members to move the tool holder to a place of rest where the lugs are out of abutting engagement with the surfaces on the oscillating shaft.

WILLIAM HAMAN'N. 

